I just went to the RIU Santa Fe last week and had a great time. They had 4 bottles of liquor in my room hanging in a dispenser. There was a note saying they would only restock the bar every other day. Like I was going to drink 4 bottles every 2 days but I did try my best.
Food was ok, maybe 1-2 steps above cruise ship level. The staff was friendly and it didn't seem necessary to tip. There were hotter chicks at the hotel than I saw in town and the pool bars were fun.
The hotel is 1.5mi or $10 from downtown so if you want to walk I'd suggest staying closer. You can walk to beach bars like the Office in about 20 min if you tire of the hotel.
Let me know if you have any other questions. I had a total blast down there.